Adding a LED light to the board

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boysenberries1
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Adding a LED light to the board

Post by boysenberries1 »

Hello,
I was able to install a pulsing 5v LED bulb to the Odroid XU4 board and it worked how ever when the board shut down the light remained on. I installed the leads to the the Con 11 header using pins 1 and 8 as ground. How would I connect to have the bulb power off with the Odroid?
Thanks

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Re: Adding a LED light to the board

Post by mad_ady »

Show us your schematic.

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Re: Adding a LED light to the board

Post by L67GS »

Pin 8 is UART, so ....

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Re: Adding a LED light to the board

Post by odroid »

It looks very normal since CON11 Pin#1 is 5volt rail which is directly connected to the DC power input.

boysenberries1
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Re: Adding a LED light to the board

Post by boysenberries1 »

Hello all,
Thank you for the replies. I initially used the Con11 pin 1 for 5v power and pin 8 for ground because the pin connectors I was using were the standard computer motherboard front pin connectors minus the square covers. There was not enough room to use pin 2 ground and not short out the system. I put some shrink warp on the metal pin connector to prevent shorting and connected the 5v LED bulb to Pin 1 and pin 2 on the con11 connector pins. The same result. The led does not turn off when the system powers down.
Are there any suggestions for the ground wire on any of the other con11 pins or any of the pins on the main con 22 pin connector. I would still draw the 5 v from the Conn11 pin 1. Maybe I could solder the ground lead from the LED pulsing bulb to the ground position of the blue run led light?
Thanks for your time and when I get the Acrylic case build done I take a picture.
Thank you for you consideration.
boysenberries1

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Re: Adding a LED light to the board

Post by odroid »

Any 5Volt pins on the XU4 board always turn on once you connect the PSU regardless of the system status.
Consider using a low voltage LED lamp and connect it to 3.3Volt power rails which turns off when the system turns off together.

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Re: Adding a LED light to the board

Post by mad_ady »

odroid wrote:Any 5Volt pins on the XU4 board always turn on once you connect the PSU regardless of the system status.
Consider using a low voltage LED lamp and connect it to 3.3Volt power rails which turns off when the system turns off together.
Except xu4 has 1.8V rail, so most likely one would need a transistor too.

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Re: Adding a LED light to the board

Post by odroid »

mad_ady wrote:
Thu Apr 01, 2021 3:24 pm
odroid wrote:Any 5Volt pins on the XU4 board always turn on once you connect the PSU regardless of the system status.
Consider using a low voltage LED lamp and connect it to 3.3Volt power rails which turns off when the system turns off together.
Except xu4 has 1.8V rail, so most likely one would need a transistor too.
You are right! :oops:

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